Ingersoll Patent Slab Milling Machine With Ingersol! Patent Cutter, shown milling 30" wide, 4" per minute. Ingersoll Milling Machine Co., Rockford, 111. from the Article MODERN MACHINE-SHOP ECONOMICS. By Horace L. Arnold. From The Engineering Magazine DEVOTED TO INDUSTRIAL PROGRESS Volume XI October 1896 NEW YORK The Engineering Magazine Co
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